Perpendicular magnetic recording medium and a magnetic reproducing apparatus
    8.
    发明授权
    Perpendicular magnetic recording medium and a magnetic reproducing apparatus 失效
    垂直磁记录介质和磁再现装置

    公开(公告)号:US06548194B2

    公开(公告)日:2003-04-15

    申请号:US09917840

    申请日:2001-07-31

    IPC分类号: G11B566

    摘要: Disclosed is a magnetic recording medium having a laminate structure comprising at least a substrate, a Co alloy bias layer, a soft magnetic layer, and a magnetic recording layer. The direction of residual magnetization of the Co alloy bias layer faces one direction of its radial direction. Also, the perpendicular magnetic recording medium satisfies the relationship given below: Mssoft×(tsoft−40 nm)>Mssoft×40 nm+Msbias×tbias where, tbias denotes the thickness of the cobalt alloy bias layer, Msbias denotes the saturation magnetization of the cobalt alloy bias layer, tsoft denotes the thickness of the soft magnetic layer, which falls within a range of between 40 nm and 200 nm, and Mssoft denotes the saturation magnetization of the soft magnetic layer.

    摘要翻译: 公开了具有至少包括基板,Co合金偏压层,软磁性层和磁记录层的叠层结构的磁记录介质。 Co合金偏置层的剩余磁化方向面向其径向方向的一个方向。 此外,垂直磁记录介质满足以下关系:其中,tbias表示钴合金偏置层的厚度,Msbias表示钴合金偏置层的饱和磁化强度,tsoft表示软磁层的厚度,其下降 在40nm至200nm的范围内,Mssoft表示软磁性层的饱和磁化强度。